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See detailÉtude de cas : allégations de santé dans le domaine de la santé osseuse
Bruyère, Olivier ULg

Conference (2011, November 16)

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See detailFigures et lieux de l’alternative : un état des lieux
Dejasse, Erwin ULg

Conference (2011, November 16)

When critically exploring alternative comics, the various actors participating in the processes of legitimization of the form—including print and broadcast media, festivals, scholars and the critical ... [more ▼]

When critically exploring alternative comics, the various actors participating in the processes of legitimization of the form—including print and broadcast media, festivals, scholars and the critical community—often privilege a handful of people (Sfar, Trondheim, Ware, Satrapi…), a small number of publishers (especially L’Association), a few particular formats such as the “graphic novel,” emblematic genres (the memoir and autobiography), or certain geographical areas such as France and/or the United States. In fact, the phenomenon of alternative comics may take a multitude of forms and is resolutely international in scope. Despite this diversity, alternative comics worldwide nevertheless share common objectives. They notably include a challenging of two of the most common critical stances directed against a multitude of “traditional” publishers of the form, namely: their inclination towards ethnocentricity and their cultivation of amnesia. Far from sweeping away the history of the form, alternative comics artists and publishers alike attach great value to the past of the medium and generally embrace it. [less ▲]

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See detailThe extended finite element method for three-dimensional reinforced composites.
Duboeuf, Frédéric ULg; Béchet, Eric ULg

Conference (2011, November 16)

This paper deals with the use of eXtended Finite Element Method (XFEM) to perform local effects in three-dimensional reinforced composites. This method was first introduced to model cracks. It is based on ... [more ▼]

This paper deals with the use of eXtended Finite Element Method (XFEM) to perform local effects in three-dimensional reinforced composites. This method was first introduced to model cracks. It is based on the partition of unity concept and the description of discontinuities like the location of holes and material interfaces is often realized by the level-set method. The approach considered allows (i) to easily model the real geometry of reinforcing fibers (not idealized), (ii) to impose arbitrary Dirichlet and Neumann boundary conditions on the implicit defined boundaries and (iii) to introduce models of degradation. Numerical applications are presented on some academic tests. [less ▲]

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See detailTopology optimization of electrostatic micro-actuators including electromechanical stability constraint
Lemaire, Etienne ULg; Van Miegroet, Laurent ULg; Rochus, Véronique et al

Conference (2011, November 16)

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See detailVitamin D, 1-84 PTH and KDIGO Guidelines
CAVALIER, Etienne ULg

Conference (2011, November 16)

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See detailEffets de la variation de pression sur la qualité des jets de pulvérisation et leur contribution aux risques de pollution environnementale.
Boukhalfa, Hassina dite Hafida ULg

Conference (2011, November 16)

Un traitement phytosanitaire s’effectue en visant un triple objectif: être efficace, ne pas mettre en danger l’opérateur et protéger l’environnement. (MOREAU et al., 1997). La quantité de pesticides ... [more ▼]

Un traitement phytosanitaire s’effectue en visant un triple objectif: être efficace, ne pas mettre en danger l’opérateur et protéger l’environnement. (MOREAU et al., 1997). La quantité de pesticides appliquée chaque année est estimée à 2.5 millions de tonnes mais la part de cette quantité qui entre en contact avec les organismes indésirables est très faible. La plupart des chercheurs l’évaluent à moins de 1% (ELAISSAOUI et al., 2004), ce qui veut dire que 99% des substances chimiques entre en contact avec le milieu environnant d’une manière non ciblé et sont potentiellement dangereux pour les écosystèmes entiers. D'après FAGOT et LARRAT (2002), la pression a un effet direct sur la répartition du produit et le volume de bouillie appliqué par son action sur la taille des gouttelettes et sur l'angle du jet de pulvérisation. Dans le but d’accroître l’efficacité de pulvérisation de pesticides et de réduire les pertes diverses de bouillie qui en résultent, nous avons étudie l’influence de la variation de pression sur la forme et la composition d’un jet de pulvérisation à l’aide d’un pulvérisateur à pression de liquide à jet projeté avec une buse à turbulence. Le travail a été effectue avec 5 valeurs de pression 0.5 bar, 1 bar, 1.5 bar, 2 bar et 2.5 bar. Les résultats obtenus nous ont permit d'en déduire que la pression de 1bar donne la meilleure couverture et répartition du jet de pulvérisation. A partir de la pression de 1.5 bar commence la dérive, et des pressions plus élevées rendent le jet irrégulier et hors cible. L'augmentation de pression augmente les pertes en bouillie et la quantité de fines gouttelettes. [less ▲]

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See detailLe projet d'enfant des couples lesbiens recourant à l'IAD
Naziri, Despina ULg; Dargentas, Magda

Conference (2011, November 15)

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See detailTon d'instit ?
Lambeau, Céline ULg

Conference (2011, November 15)

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See detailThe ecological study of an unknown non-timber forest product (NTFP): the African walnut (Coula edulis Baill.)
Moupela, Christian ULg; Vermeulen, Cédric ULg; Lebailly, Philippe ULg et al

Conference (2011, November 15)

Le noisetier d’Afrique, Coula edulis Bail., produit des graines de grande valeur nutritive régulièrement collectées et commercialisées par les populations locales. Toutefois, certains aspects fondamentaux ... [more ▼]

Le noisetier d’Afrique, Coula edulis Bail., produit des graines de grande valeur nutritive régulièrement collectées et commercialisées par les populations locales. Toutefois, certains aspects fondamentaux de son écologie, dont le potentiel de production, la dispersion et la prédation des fruits, demeurent inconnus, ce qui pourrait constituer un frein à sa valorisation. L’étude s’est déroulée au Gabon et s’est attachée à quantifier la production fruitière de l’espèce et à identifier les prédateurs et disperseurs des fruits. Trente-neuf collecteurs circulaires ont été installés sous les houppiers, les données récoltées (nombre et masse des fruits) étant ensuite mises en relation avec le diamètre. Par ailleurs, sept semenciers ont fait l’objet d’observations indirectes grâce à un dispositif de caméras-pièges. Les premières fructifications apparaissent sur les semenciers à partir de 12,3 cm de diamètre. Elle se produit de janvier à avril. Les quantités de fruits sont corrélées positivement au diamètre (r² = 0,493 ; p = 0,001). Dix espèces animales ont été observées aux pieds des arbres en fruits, leur rôle dans la dynamique de population de l’espèce est potentiellement important. [less ▲]

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See detailGas Flow Simulations in a Structured Packing by Lattice Boltzmann Method
Beugre, Djomice; Calvo, Sébastien ULg; Crine, Michel ULg et al

Conference (2011, November 15)

Numerical simulations of gas flow between two sheets of plastic MellapakTM 250 Y are performed using Lattice Boltzmann methods in laminar and turbulent regimes. Results are compared with experimental ... [more ▼]

Numerical simulations of gas flow between two sheets of plastic MellapakTM 250 Y are performed using Lattice Boltzmann methods in laminar and turbulent regimes. Results are compared with experimental measurements and with known correlations. They are also compared with simulations using a classical CFD code. In all cases, the agreement is very good. [less ▲]

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See detailModelling of frictional unilateral contact in automotive differentials
Virlez, Geoffrey ULg; Cardona, Alberto; Bruls, Olivier ULg et al

Conference (2011, November 14)

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See detailDevelopment of a thorax CT-scan based finite element model for thoracic injury assessment
Nsiampa, Nestor; D'Otreppe, Vinciane ULg; Robbe, Cyril ULg et al

Conference (2011, November 14)

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See detailImage-based Finite Element Mesh Generation for Microstructures
D'Otreppe, Vinciane ULg; Mengoni, Marlène ULg; Boman, Romain ULg et al

Conference (2011, November 14)

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See detailEfficient evaluation of the geometrical validity of curvilinear finite elements
Johnen, Amaury ULg; Remacle, Jean-François; Geuzaine, Christophe ULg

Conference (2011, November 14)

The development of high-order numerical techniques on unstructured grids has been underway for many years. The accuracy of these methods strongly depends of the accuracy of the geometrical discretization ... [more ▼]

The development of high-order numerical techniques on unstructured grids has been underway for many years. The accuracy of these methods strongly depends of the accuracy of the geometrical discretization, and thus depends on the availability of quality curvilinear meshes. The usual way of building such curvilinear meshes is to first generate a straight sided mesh. Then, mesh entities that are classified on the curved boundaries of the domain are curved accordingly. Some internal mesh entities may be curved as well. If we assume that the straight sided mesh is composed of well shaped elements, curving elements introduces a kind of "shape distortion" that should be controlled so that the final curvilinear mesh is also composed of well shaped elements. In this work we propose a method to analyze curvilinear meshes in terms of their elementary jacobians. The method does not deal with the actual generation of the high order mesh. Instead, it provides an efficient way to guarantee that a curvilinear element is geometrically valid, i.e., that its jacobian is strictly positive in all its reference domain. It also provides a way to measure the distortion of the curvilinear element. The key feature of the method is to adaptively expand the elementary jacobians in a polynomial basis, built using Bézier functions, that has both properties of boundedness and positivity. The algorithm has been implemented in the open-source mesh generator Gmsh, and allows to control the geometrical validity of curvilinear meshes made of triangles, quadrangles, tetrahedra, hexahedra and prisms of any order. [less ▲]

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See detailQuelques caractérisations des espaces de Hölder généralisés
Kreit, Damien ULg

Conference (2011, November 14)

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See detailTopology optimization of compliant mechanisms: Application to vehicle suspensions.
Tromme, Emmanuel ULg; Lemaire, Etienne ULg; Duysinx, Pierre ULg

Conference (2011, November 14)

An efficient method to design a compliant vehicle suspension with only topology optimization.

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See detailEffect of drug candidates for the treatment of Alzheimer's disorber on hippocampus-dependent learning, glutamate receptors and mitochondria
Vignisse, Julie ULg; Steinbusch, H.W.M; Bolkunov, A. et al

Conference (2011, November 12)

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See detailRaymond Lemaire and History of Architecture Applied to Urbanism
Houbart, Claudine ULg

Conference (2011, November 10)

“I don’t have the pretention of having created a new trend in urbanism. I am simply convinced that there is more genius and intelligence in the long experience accumulated by the generations, facing the ... [more ▼]

“I don’t have the pretention of having created a new trend in urbanism. I am simply convinced that there is more genius and intelligence in the long experience accumulated by the generations, facing the problems of life, than in one single man’s head, even brilliant”. Raymond Lemaire synthesizes, in these words, in 1988, his vision of urbanism, in an interview on his project of Port-la-Rochette, a neo-traditional tourist centre on the shore of one of the Eau d’Heure Lakes . During his whole career, but more particularly in the 1970’s and 1980’s, Lemaire has skilfully used his abilities as an architectural historian to put forward an alternative vision of the city to the more and more questioned modernism. Experimented through many projects all over the country, the methodology set up following the renovation works of the Groot Begijnhof of Leuven (1964-1971) is applied to some of the fragments of ancient urban fabric that subsist in Brussels, threatened by construction projects and “progressive” urbanism. For the association Quartier des Arts or the city administration, he works not only on conservation projects of buildings within these areas, but also on the elaboration of normative plans supposed to guarantee the harmonious continuity of the new and the ancient built environment. This is a real application of history of architecture to prospective urbanism, the extreme expression of which can be seen in the design of Louvain-la-Neuve, that cannot be detached from Lemaire’s experience in urban renewal. This contribution will attempt to examine the modes according to which Lemaire uses his historical knowledge to put forward a new vision of the ancient city, through case studies in Brussels, often not realized. Theses case studies can bring some light on certain aspects of historicist urbanism, its political implications, and also its limits. [less ▲]

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See detailAnalysis of historical grating spectra: Jungfraujoch atmospheric database extended back to 1977
Demoulin, Philippe ULg; Roland, Ginette; Bader, Whitney ULg et al

Conference (2011, November 10)

Historical solar spectra recorded at the Jungfraujoch station with a high-resolution grating spectrometer have been re-analyzed to derive total columns of a series of atmospheric gases. This instrument ... [more ▼]

Historical solar spectra recorded at the Jungfraujoch station with a high-resolution grating spectrometer have been re-analyzed to derive total columns of a series of atmospheric gases. This instrument, built and operated by the University of Liège (Belgium), was used in the Sixties and Seventies to record two solar spectrum atlases extending from the near-UV to the near-IR. From 1977 to 1989, it was also regularly used to record narrow spectral intervals in the mid-infrared, encompassing absorption lines of gases of atmospheric interest, e.g. CH4, HF, HCl, H2O, N2O, NO2, C2H6, O3 and CO. More than 10 thousand spectra were recorded during this period. The total columns derived from these grating spectra have been combined with the FTIR columns derived at the Jungfraujoch since the mid-1980s, in order to derive the temporal evolution of various target gases for the period 1977-2011. [less ▲]

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See detailProspects for performing «responsible innovation» in research institutions
Thoreau, François ULg

Conference (2011, November 09)

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See detailComparisons of long-term stratospheric nitric acid and hydrogen fluoride variations using satellite and ground-based measurements
Froidevaux, L.; Anderson, J.; Hannigan, J. et al

Conference (2011, November 09)

We investigate the long-term variations of stratospheric nitric acid (HNO3) and hydrogen fluoride (HF), based on several satellite and ground-based measurement records. We use results from the Upper ... [more ▼]

We investigate the long-term variations of stratospheric nitric acid (HNO3) and hydrogen fluoride (HF), based on several satellite and ground-based measurement records. We use results from the Upper Atmosphere Research Satellite (launched in late 1991 and decommissioned in late 2005), the Aura satellite (launched in summer 1991, with on-going measurements), and the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) (from 2004 to present), in conjunction with several long-term ground-based datasets from the Network for the Detection of Atmosphere Composition Change (NDACC). In particular, we investigate the time series of HNO3 and HF, using NDACC column data for validation. We focus here on a few NDACC sites with long-term and frequent measurements, namely the Jungfraujoch (45N, 8E), Lauder (45S, 170E), and Mauna Loa (20N, 204E) sites, where ground-based Fourier Transform Infrared (FTIR) measurements have covered both the UARS and Aura time periods (1991 to present). For HNO3, we investigate whether there are indications of a systematic offset between the measurements by the Microwave Limb Sounder (MLS) instruments aboard both UARS and Aura. For hydrogen fluoride, the HALogen Occultation Experiment's HF time series are connected to the ACE-FTS dataset, and we analyze the correlation of this time series with the ground-based datasets. In addition, model runs from the Whole Atmosphere Community Climate Model (WACCM) and the TOMCAT/SLIMCAT model are used as part of the long-term time series intercomparisons. We note that there is a significant time gap in the HNO3 time series from the satellite measurements used here. The long-term satellite datasets studied here include zonal average Earth Science Data Records (ESDRs) being produced under the Global Ozone Chemistry And Related trace gas Data records for the Stratosphere (GOZCARDS) project, part of the NASA Making Earth Science data records for Use in Research Environments (MEaSUREs) program. We also analyze coincident-type measurements, for the comparisons between satellite and ground-based observations. [less ▲]

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See detailInnovation : relations entre universités et entreprises
Artige, Lionel ULg

Conference (2011, November 09)

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See detailMarine predators as sentinels for our oceans and human health
Das, Krishna ULg; Bouquegneau, Jean-Marie ULg

Conference (2011, November 08)

“During the course of the 20th century, the planet became and is now chemically different from any previous time”. (1) Organic and inorganic chemicals occur in greater abundance because of human activity ... [more ▼]

“During the course of the 20th century, the planet became and is now chemically different from any previous time”. (1) Organic and inorganic chemicals occur in greater abundance because of human activity and end up in the ocean. As more humans inhabit coastal regions, question arises about the health of our oceans. Marine vertebrates such as marine fish, turtles, birds and mammals are used to get early warning about negative trends and impact linked to anthropogenic activities. Such organisms are qualified as sentinel species (2). In turn, sentinels will permit us to better characterize and potentially manage negative impacts on human and animal health associated with our oceans. Marine predators including marine mammals and birds can present elevated concentrations of these organic and inorganic chemicals in their tissues, due to their high position in the trophic chain, their life span, and their fat store in which lipophilic chemicals accumulate. Humans and marine predators share common routes of exposures such as (1) the maternal transfer through placenta and milk and (2) trophic transfer through ingestion of marine fish and shellfish. Furthermore, some human population rely on marine mammal consumption for subsistence. Marine predators offer a snapshot of ocean health that could potentially impact human health. In the hope that this paper will stimulate the research much needed for assessing ocean health in the context of a rapidly changing environment, we provide here a review of (i) levels and trends of contaminants and relationships with biotic and abiotic factors, (ii) toxicological effects and (iii) spatial and geographical trends in tissues of marine predators. We conclude this communication by presenting several necessary perspectives such a more thorough follow of organic and inorganic pollutants in the marine environment including the use of isotopic tracers to assess the local versus global aspects of marine pollution. (1) Reddy, C. M., Stegeman, J. J. & Hahn, M. E. in Oceans and human Health (eds P.J. Walsh et al.) 121-144 (Academic Press, 2008). (2) Bossart G.D. (2011). Vet. Path. 48:676-690. [less ▲]

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See detailL'insuffisance rénale : fatalité liée à l'âge?
Krzesinski, Jean-Marie ULg

Conference (2011, November 08)

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See detailPolitics of biotechnology in Latin America: the RR soybean Argentina case study
Delvenne, Pierre ULg

Conference (2011, November 08)

The presentation is based on Argentina and it focuses on biotechnology in agriculture. Argentina today is the second largest exportator of GM crops and it has been the first country in Latin America to ... [more ▼]

The presentation is based on Argentina and it focuses on biotechnology in agriculture. Argentina today is the second largest exportator of GM crops and it has been the first country in Latin America to establish a professional regulatory framework in the early 1990s. Round Up Ready (RR) soybean crops is specifically analysed because of its importance — more than 60% of the cultivated areas — and its controversial aspect : it is presented at the same time as an elixir for agro-industrial ills and as a techno-economic network increasing the benefits of the global North while dramatically affecting public health and the environment. We suggest to diagnose developments and perceptions of issues related to health, economy, ecological diversity, fertility of soils, regulation and intellectual property. Our methodology favours qualitative data collection and analysis, while using quantitative data when available and relevant. [less ▲]

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See detailYet Another Story of Networks! Prospects for Performing "Responsible Innovation"
Thoreau, François ULg

Conference (2011, November 05)

Detailed reference viewed: 31 (3 ULg)
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See detailEtude de prévalence du burnout dans la population des travailleurs belges
Schippers, Nathalie ULg; DE CIA, Julie ULg; Barbier, Marie ULg et al

Conference (2011, November 04)

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See detailVacant properties in Liege: An introduction to the case studies
Halleux, Jean-Marie ULg

Conference (2011, November 04)

Detailed reference viewed: 16 (1 ULg)
See detailRécits de vie, récits de fondation, autour des annonciades de Saint-Mihiel
Henneau, Marie-Elisabeth ULg

Conference (2011, November 04)

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See detailEnvironmental performance of waste management through years using Life Cycle Assessment
Belboom, Sandra ULg; Renzoni, Roberto ULg; Digneffe, Jean-Marc et al

Conference (2011, November 03)

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See detailBehind Rossmo's assumptions: further hypotheses to make geographic profiling more operational
Trotta, Marie ULg

Conference (2011, November 03)

Funded by the Belgian National research fund (FRS-FNRS), I am currently collaborating with several services of the federal police of Belgium (strategic, operational and behavioural analysts) to develop ... [more ▼]

Funded by the Belgian National research fund (FRS-FNRS), I am currently collaborating with several services of the federal police of Belgium (strategic, operational and behavioural analysts) to develop operational techniques to implement geographic profiling – including temporal aspects of crime scene – on the Belgian territory. Belgium is characterized by a small and highly populated territory with a complex road network; which require more concerns about its geographical features than the regular grids of American cities. <br /> <br />From an operational perspective, few studies have focused on the conditions favouring the application of GP. Rossmo defined five criteria for effective likelihood surface, but these criteria are often difficult to verify with the data gathered during the investigations. This presentation proposes to study the relationships between those applicability hypotheses, crime types, and spatio-temporal aspects of the crime in order to better predict the surface effectiveness. <br /> <br />Then, we discuss the difficulty to meet those assumptions for serial rapes in Belgium. Non-uniform pattern and multiple residences for offenders are some of the factors hampering those assumptions. <br /> <br />An unsolved case of rapes submitted by the police illustrates how a GP reasoning is still possible when Rossmo’s criteria are not met. The objective was to delineate a priority area around crime locations for DNA testing as the offender was assumed to be local. The series presents a pattern focusing on two different city centers. For this reason, the likelihood surface was generated under a different assumption than the classical distance decay. Indeed, our analysis of the crimes pattern in relation to the road network points out a new hypothesis for the offender’s spatial behaviour: spatial consistency in travelled distances to commit the crimes instead of a distance decay function. <br /> <br />This hypothesis was supported by an analysis of the ‘neutrality’ of the series crime locations. Brantingham distinguished crime generators/attractors from neutral places as a function of the attractiveness of place. According to him, distance decay functions can only be applied to neutral places. In our series, it appears that only one location was located in rural area, in a very unattractive place for rapes. By contrast, the others were located in the city centers or near night clubs. We concluded that there was a high probability for the offender to come from this village. Subsequent DNA analyses of the residents of that village confirmed our hypothesis. [less ▲]

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See detailAppui à la gestion et à la protection des ressources en eaux souterraines exploitées dans la région de Bobo Dioulasso (Burkina Faso) – mise en place d’une base de données spatiales
Sauret, Elie ULg; Gardin, Nicolas; Kam, Ahmed et al

Conference (2011, November 03)

Située au sud ouest du Burkina Faso, dans la région de Bobo Dioulasso, le bassin du kou couvre 1860km2 de superficie et héberge d’énormes réservoirs en eau souterraines auxquels sont associés ... [more ▼]

Située au sud ouest du Burkina Faso, dans la région de Bobo Dioulasso, le bassin du kou couvre 1860km2 de superficie et héberge d’énormes réservoirs en eau souterraines auxquels sont associés d’importantes sources diffuses. Ces réserves en eau sont sollicitées pour l’alimentation en eau de boisson, l’industrie, l’agriculture irriguée et l’élevage ; elles ont été et demeure l’objet de nombreuses études touchant l’ingénierie de l’eau et des sols, l’imagerie satellitaire et géophysique, l’hydrochimie…. Depuis 2005, le projet de coopération bilatérale entre la WBI1 et le MAHRH-BF2 dénommé : « Appui à la gestion et à la protection des ressources en eaux souterraines exploitées dans la région de Bobo – Dioulasso » a permis de collecter, compiler et archiver des données (numériques, papiers, cartes…) qui ont servi à la construction d’une base de données spatiales couplées à un SIG (ArcGis). Des post-traitements de ces données ont permis l’établissement de cartes thématiques sur les ressources en eau de la région : carte hydrogéologique, carte de la vulnérabilité intrinsèque des aquifères souterrains, carte hydrogéomorphologique…….Utilisée au sein du projet pour les travaux de thèse en cours, la GDB des ressources en eau du bassin du Kou est largement vulgarisée et diffusée à l’échelle régionale et nationale aux utilisateurs et acteurs du domaine de l’eau. [less ▲]

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See detailLe nozze (e l’imminente divorzio) di Filologia e Metrica
Valenti, Gianluca ULg

Conference (2011, November 03)

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See detailEvolving trends in Latin American politics of biotechnologies: delving into the “GM soya model” in Argentina
Delvenne, Pierre ULg; Vara, Ana Maria; Vasen, Federico

Conference (2011, November 02)

Our interest is to understand the challenges to modern science and innovation regimes under conditions of globalization and “multiple modernities” (Eisenstadt 2000). Different scholarly attention has been ... [more ▼]

Our interest is to understand the challenges to modern science and innovation regimes under conditions of globalization and “multiple modernities” (Eisenstadt 2000). Different scholarly attention has been paid to existing institutions that may no longer be adequate to address those challenges. This may be because modern institutions are pressured for a greater reflexive opening up of their structures (Beck and Lau 2005) or because the modern world-system is facing severe turbulences that would ultimately lead to a time of structural dissolution (Wallerstein 2005). This renders it interesting to trace the responses to these challenges, and we suggest doing it in the field of STS. Our ongoing multi-level comparative research takes Latin American countries as an entrance point to finding responses that are different from those occurring in European countries. Our presentation is based on Argentina and it focuses on biotechnology in agriculture. Argentina today is the second largest exporter of GM crops and it has been the first country in Latin America to establish a professional regulatory framework in the early 1990s. GM soya crop is specifically analysed because of its importance — more than 60% of the cultivated areas — and its controversial aspect : it is presented at the same time as an elixir for agro-industrial ills and as a techno-economic network increasing the benefits of the global North while dramatically affecting public health and the environment. We suggest diagnosing developments and perceptions of issues related to health, economy, ecological diversity, fertility of soils, regulation and intellectual property. [less ▲]

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See detailBoolean methods in operations research and related areas
Crama, Yves ULg

Conference (2011, November)

These are the slides of the "IFORS Distinguished Lecture" that I delivered at the INFORMS Annual meeting in November 2011. The title of the lecture is the title of a monograph co-authored by Peter L ... [more ▼]

These are the slides of the "IFORS Distinguished Lecture" that I delivered at the INFORMS Annual meeting in November 2011. The title of the lecture is the title of a monograph co-authored by Peter L. Hammer and Sergiu Rudeanu, which appeared in 1968. Their pioneering work has stimulated a large amount of research and has been very frequently cited. Over the last year, the late Peter Hammer and myself have published two distant follow-ups to this classical book: a monograph entitled Boolean Functions: Theory, Algorithms, and Applications (700 pages, Cambridge University Press, 2011), and a collection of survey papers on Boolean Models and Methods in Mathematics, Computer Science and Engineering (780 pages, Cambridge University Press, 2010). The size of these two volumes and of their bibliographic sections are witnesses of the vitality of the field and of its impressive development. Boolean functions are actually among the most fundamental objects investigated in mathematics, and provide the basic building blocks for many models arising in operations research, computer science, artificial intelligence, economics, engineering, cryptography, biology, and other fields of application. In this lecture, I propose a brief overview of some fundamental Boolean models, I discuss applications in corporate governance (modeling of shareholders’ power) and in classification (Logical Analysis of Data), and I mention a few challenging research problems. [less ▲]

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See detailUsing the course syllabus to document the quality of teaching and identifying its most useful items according to the students
Leduc, Laurent ULg

Conference (2011, November)

Alongside its well-known functions of contract or communication tool, the course syllabus would also represent a suitable evidence of teaching quality. Indeed, for the last decade, more references to ... [more ▼]

Alongside its well-known functions of contract or communication tool, the course syllabus would also represent a suitable evidence of teaching quality. Indeed, for the last decade, more references to syllabi is being recommended in faculty evaluation and in accreditation reviews. This paper first discusses the use of syllabus items in documenting and increasing the quality of course planning according to the literature. Secondly, in order to inspire institutions in their choices of the most valuable syllabus items, this paper reports the result of a survey lead at the University of Liège in order to identify the most useful generic components to be included in course syllabi according to students’ opinion. Items like Assessment methods and criteria; Learning objectives/outcomes; Recommended or required readings and Learning advices appeared to be among the most wanted ones. [less ▲]

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See detailComparison of Machine Learning techniques for atmospheric pollutant monitoring in a Kraft pulp mill
Sainlez, Matthieu ULg; Heyen, Georges ULg

Conference (2011, November)

In this paper, machine learning techniques are compared to predict nitrogen oxide (NOx) pollutant emission from the recovery boiler of a Kraft pulp mill. Starting from a large database of raw process data ... [more ▼]

In this paper, machine learning techniques are compared to predict nitrogen oxide (NOx) pollutant emission from the recovery boiler of a Kraft pulp mill. Starting from a large database of raw process data related to a Kraft recovery boiler, we consider a regression problem in which we are trying to predict the value of a continuous variable. Generalization is done on the worst case configuration possible to make sure the model is adequate: the training period concerns stationary operations while test periods mainly focus on NOx emissions during transient operations. This comparison involves neural network techniques (i.e., static multilayer perceptron and dynamic NARX network), tree-based methods and multiple linear regression. We illustrate the potential of a dynamic neural approach compared to the others in this prediction task. [less ▲]

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See detailConversion of a B-Rep CAD model to an implicit representation in the context of the X-FEM
Mouton, Thibaud ULg; Béchet, Eric ULg

Conference (2011, November)

This paper deals with the alternative representation of parametric CAD models in the context of the Extended Finite Element Method (X-FEM) [1]. Partition of unity methods like the X-FEM allows to embed in ... [more ▼]

This paper deals with the alternative representation of parametric CAD models in the context of the Extended Finite Element Method (X-FEM) [1]. Partition of unity methods like the X-FEM allows to embed in finite element functional spaces any discontinuity. It is so theoretically possible to simulate a complete model without any of its geometrical features appearing in the mesh. Nevertheless, X-FEM was at first only used in geometrically simple application (e.g. cracks) due to the lack of method to make features of a complex CAD model to implicitly appear in the functional spaces. The geometry of the crack was originally modeled using Level Sets because of their ability to handle complex surfaces and naturally take into account changes in topology and geometry encountered with moving interfaces. Level Sets modelling has been recently extended in combination with a Constructive Solid Geometry (CSG) approach [2] but this method is still limited by the use of globally defined Level Sets. The proposed algorithm extends the Level Sets modelisation of the geometry using the Boundary Representation (B-Rep) of the object. In this case, Level Sets are only locally defined (Fig a). A sub- mesh is then obtained by cutting a primary fixed mesh (encompassing the CAD model) along with isozero of each Level Set (Fig b). Resulting sub-elements are then sorted to build a temporary topology. One of the difficulties involved is then to match the temporary topology with the original B-Rep topology (Fig c). The aim is to recover unmodified entities and detect deleted or new entities that could appear during the deformation of the object. Finally, examples of computations in linear elasticity will be shown. [less ▲]

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See detailAntibody evasion by a gammaherpesvirus O-glycan shield.
Machiels, Bénédicte ULg; Gillet, Laurent ULg

Conference (2011, November)

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See detailLa lecture herméneutique du logos
Gauvry, Charlotte ULg

Conference (2011, November)

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See detailDam break flow modelling with uncertainty analysis
Dewals, Benjamin ULg; Archambeau, Pierre ULg; Erpicum, Sébastien ULg et al

Conference (2011, November)

The failure of a large dam may result in catastrophic floods in the downstream valley. However, past experience has revealed that loss of life and damage can be drastically reduced if crisis management is ... [more ▼]

The failure of a large dam may result in catastrophic floods in the downstream valley. However, past experience has revealed that loss of life and damage can be drastically reduced if crisis management is planned in advanced, including early-warning systems, organized communication and structural measures. This requires a fairly good knowledge of the inundation characteristics likely to be induced in case of a failure. Predictions of flood waves induced by dam failure are affected by a considerable level of uncertainty. Due to the extreme nature of such events, numerical models can hardly be calibrated and validated. Flow resistance parameterizations are designed for ranges of flow properties which significantly differ from those occurring during dam break flows. Large amounts of debris may also be transported by the flow and the details of the failure scenario remain usually unknown, such as sequence of dislodgement of dam wall fragments or breach formation time (e.g., Dewals et al. 2011). Nonetheless, most dam break flow studies so far have been conducted without systematic uncertainty nor sensitivity analyses. This is partly due to the high computational cost of the multidimensional flow models used to simulate dam break flows on natural topography. We present here the simulation of a real dam break flow with a systematic analysis of the uncertainty resulting from the roughness coefficient, the failure hydrograph and topographic data. The flow simulations have been conducted with the model WOLF 2D developed at the University of Liege. It solves the fully dynamic shallow-water equations based on a finite volume scheme and a self-developed flux-vector splitting (Erpicum et al. 2010a; Erpicum et al. 2010b). Monte-Carlo simulations have been used to perform the uncertainty analysis. The two-dimensional flow model is computationally too costly to perform a high number of repeated runs, as needed for Monte Carlo simulations. Therefore, a “reduced complexity model” has been set up, in the form of multidimensional Hermite polynomials. The method developed by Isukapalli et al. (Isukapalli et al. 2004) indicates the number of simulations of the complete model needed to calibrate the polynomials, as well as the parameter values to be used in these calibration runs. The methodology has been tested for a real dam break which occurred in Spain in 1982 (Alcrudo and Mulet 2007) and for which a number of observations are available (mainly maximum water depths at different locations in a town). The presentation will show the applicability and efficiency of the methodology, which is readily available for real-world analyses. Such uncertainty analysis for dam break flows disclose crucial information for practical risk management. In particular, they reveal that the uncertainty ranges on maximum water depth and time of arrival of the front are not symmetric (overestimation vs. underestimation) and very unevenly distributed in space. [less ▲]

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See detailManage depleated lands on the outskirts of Kinshasa. A landscape approach for a simple management plan development.
Vermeulen, Cédric ULg; Dubiez, Emilien; Peltier, Régis et al

Conference (2011, November)

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See detailThe clinical and economic implications of non-adherence with osteoporosis medications in Ireland
Hiligsmann, Mickaël ULg; McGowan, Bernie; Bennett, Kathleen et al

Conference (2011, November)

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See detailAssisted Natural Regeneration (ANR): a tool for degraded tropical forests rehabilitation in Central Africa
Peltier, Régis; Proces, Pierre; Marquant, Baptiste et al

Conference (2011, November)

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See detailCoupling approach in building physics.
Barbason, Mathieu ULg; Reiter, Sigrid ULg

Conference (2011, November)

CFD and Multizone Simulations can be coupled to improve their performance. This presentation tackles the possibilities of this technique and its difficulties.

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See detailLes nouveaux défis du développement territorial
Teller, Jacques ULg

Conference (2011, November)

Dans le cadre des travaux d’actualisation du SDER, le Gouvernement Wallon a retenu six défis prioritaires : la démographie, le climat, l’énergie, la compétitivité, la cohésion sociale et la mobilité. Les ... [more ▼]

Dans le cadre des travaux d’actualisation du SDER, le Gouvernement Wallon a retenu six défis prioritaires : la démographie, le climat, l’énergie, la compétitivité, la cohésion sociale et la mobilité. Les différences de nature et de statut de ces défis sont manifestes. Nous avons toutefois retenu trois grands traits communs dans le cadre de leur définition : les défis sont pour partie exogènes au territoire wallon ; ils sont de nature « politique » et ils n’étaient pas suffisamment pris en compte dans le SDER 99. La CPDT s’est dès lors attachée à clarifier les pressions que ces défis imposent sur le territoire. L’accent a été mis sur la manière dont les défis se traduisent spécifiquement sur notre territoire, en identifiant les tendances observées et les hypothèses d’évolution aux horizons 2020 et 2040 pour la Wallonie. [less ▲]

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See detailEmpowerment en prison. Un nouvel enfermement ?
Absil, Gaëtan ULg

Conference (2011, November)

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See detailThe ecological study of an unknown non-timber forest product (NTFP) : The African walnut (Coula edulis Baill.)
Moupela, Christian; Vermeulen, Cédric ULg; Brostaux, Yves ULg et al

Conference (2011, November)

Le noisetier d’Afrique, Coula edulis Bail., produit des graines de grande valeur nutritive régulièrement collectées et commercialisées par les populations locales. Toutefois, certains aspects fondamentaux ... [more ▼]

Le noisetier d’Afrique, Coula edulis Bail., produit des graines de grande valeur nutritive régulièrement collectées et commercialisées par les populations locales. Toutefois, certains aspects fondamentaux de son écologie, dont le potentiel de production et la prédation des fruits, demeurent inconnus, ce qui peut constituer un frein à sa valorisation. L’étude s’est déroulée au Gabon et s’est attachée à quantifier la production fruitière de l’espèce et à identifier les prédateurs potentiels des fruits. Trente-neuf collecteurs circulaires ont été installés sous les houppiers, les données récoltées (nombre et masse des fruits) étant ensuite mises en relation avec le diamètre. Par ailleurs, sept semenciers ont fait l’objet d’observations indirectes grâce à un dispositif de caméras-pièges. Le diamètre minimum de fertilité est de 12,3 cm, tandis que 23 cm dhp constitue pour l’espèce le diamètre effectif de fructification. Celle-ci se produit de décembre à avril. Les quantités de fruits sont corrélées positivement au diamètre. Dix espèces animales ont été observées aux pieds des arbres en fruits, leur rôle dans la dynamique de l’espèce est potentiellement important. [less ▲]

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See detailInvolvement of the community in physical activity promotion. Analysis of the Wallonian context
Cloes, Marc ULg

Conference (2011, November)

Communities are in the center of the action aiming to promote physical activity. Their links with the schools are a determining factor for the global policy. This presentation is focused on the current ... [more ▼]

Communities are in the center of the action aiming to promote physical activity. Their links with the schools are a determining factor for the global policy. This presentation is focused on the current situation of this necessary collaboration in a European region: Wallonia (French speaking part of Belgium). Several studies conducted since the beginning of the 21st century are analyzed in order to point out the real relationships between the schools and the communities. Between the theory based on the official policies and the concrete actions implemented on the field, it seems that the vision is less enthusiastic than expected. [less ▲]

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See detailThe partipatory approach : a tool for the sustainable management of forest ressources by local communities
Larzilière, Adélaïde; Vermeulen, Cédric ULg; Peltier, Régis et al

Conference (2011, November)

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See detailExtinction dynamics of gymnosperms: unequal vulnerability, sampling bias or both?
Cascales - Miñana, Borja ULg; Cleal, Christopher J.; Ferrer, Javier et al

Conference (2011, November)

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See detailEmprunts vs formes héritées: l'analyse phonétique au service de l'histoire
Baiwir, Esther ULg

Conference (2011, November)

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See detailDike-break induced flows: a simplified model
Stilmant, Frédéric ULg; Dewals, Benjamin ULg; Archambeau, Pierre ULg et al

Conference (2011, November)

A simplified model for the prediction of the steady-state outflow through a breach in an inland dike is presented. It consists in the application of the mass and momentum conservation principles to a ... [more ▼]

A simplified model for the prediction of the steady-state outflow through a breach in an inland dike is presented. It consists in the application of the mass and momentum conservation principles to a macroscopic control volume. A proper definition of the shape of the control volume enables to take into account the main characteristics of the flow and thus to compensate for the extreme simplification of the space discretisation of the model. At the breach, a relation derived from the shallow-water equations is used to determine the directions of the flow. Developments have been guided by numerical simulations and results have been compared to experimental data. Both the precision and the application domain of the simplified model are found satisfactory. [less ▲]

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See detailHydromorphological restoration of Alpine rivers
Rulot, François ULg; Dewals, Benjamin ULg; Erpicum, Sébastien ULg et al

Conference (2011, November)

More and more efforts are undertaken to restore rivers in a state close to their natural conditions in order to meet the Water Framework Directive requirement. This directive commits EU member states to ... [more ▼]

More and more efforts are undertaken to restore rivers in a state close to their natural conditions in order to meet the Water Framework Directive requirement. This directive commits EU member states to achieve a good ecological status of all their water bodies. It became thus very important to develop river restoration such as fish passages, bank renaturation, natural bars or meanders. Another important component of river restoration schemes is the decommissioning of man-made structures. These interventions can have significant impact on the river hydrology, hydraulics and morphology, such as bed degradation or aggradation, bank failures. Predicting these impacts of restoration schemes on the river, especially for large scale projects, should rely on detailed numerical studies. To achieve this goal, we develop a methodology to analyse different scenarios of river restoration based on several criteria related to flow, sediment transport and environment. This method is applied to the case of a French alpine river in which five hydropower plants will be replaced by a unique underground hydropower plant on the same section of river. [less ▲]

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See detailImproved stability and transient behaviour of generalized-alpha time integrators for constrained flexible systems
Arnold, Martin; Bruls, Olivier ULg; Cardona, Alberto

Conference (2011, November)

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See detailAgro-Joint agricultural colonies in Crimea and southern Ukraine (1924-1938): Fordism and settlement patterns
Fisher, Axel ULg

Conference (2011, November)

The Agro-Joint project (1924-1938), conceived and directed by the Russian-born American agronomist Joseph Rosen (1877-1949) and promoted by the American Jewish Joint Distribution Committee, was one of the ... [more ▼]

The Agro-Joint project (1924-1938), conceived and directed by the Russian-born American agronomist Joseph Rosen (1877-1949) and promoted by the American Jewish Joint Distribution Committee, was one of the most effective and ambitious philanthropic relief programs envisioned and implemented for the resettlement and «productivization» of Russian Jews as avant-garde farmers in Soviet Crimea and southern Ukraine. The present paper discusses, from a planner and architect’s perspectives, some of the Agro-Joint plans, projects and planning reports contained in the J. Rosen archives stored at the YIVO Institute for Jewish Research (New York). [less ▲]

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See detailLes enjeux de la diversité identitaire dans la gestion des processus de modernisation. Le cas d’une administration régionale belge
Rondeaux, Giseline ULg

Conference (2011, November)

Colloque - En situation de crise ou de bouleversement organisationnel profond, la question de l’identité organisationnelle apparaît souvent de manière critique (Albert et Whetten, 1985 ; Alvesson et ... [more ▼]

Colloque - En situation de crise ou de bouleversement organisationnel profond, la question de l’identité organisationnelle apparaît souvent de manière critique (Albert et Whetten, 1985 ; Alvesson et Empson, 2008 ; Dutton et al, 1994). Celle-ci ne peut être considérée comme une dimension monolithique : chaque stade de l’évolution d’une organisation est en effet marqué par différentes interactions (différentes logiques identitaires dont certaines prédominent d’autres à certains moments). Ainsi, même si au sein d’une identité organisationnelle, une logique identitaire particulière semble prévaloir, d’autres logiques identitaires sont néanmoins présentes, ou apparaissent, en mode officieux. L’identité organisationnelle se conçoit donc comme hybride: d’une part la logique identitaire dominante; d’autre part, des logiques identitaires alternatives, constituées des perceptions diversifiées sur ce qui est stable, central et distinctif dans l’organisation, ses valeurs, ses principes de fonctionnement. La contribution que nous proposons s’intéresse à cette question de l’identité organisationnelle dans le cadre des processus de modernisation de l’administration, dont la logique dominante apparaît comme marquée par l’influence du New Public Management (NPM) ou du post-NPM. A partir de l'analyse de la réforme Copernic (introduction du NPM dans l'administration fédérale belge) réalisée en 2005-2006, nous avons élaboré de manière inductive une typologie des logiques et profils identitaires, à partir d’entretiens qualitatifs (Rondeaux, 2006, 2007, 2008, 2010). Sur base de celle-ci, nous avons ensuite construit un questionnaire de diagnostic identitaire, visant à cartographier les profils identitaires d’une organisation en cours de réforme. Ce questionnaire a été administré à un échantillon de 2000 personnes dans une administration régionale belge engagée dans un processus de modernisation depuis 2006. Outre l’analyse statistique de cette enquête, nous mobilisons également diverses sources d’information complémentaires de nature qualitative : 20 entretiens exploratoires auprès d’acteurs clés de l’administration régionale, ainsi que les nombreux e-mails que nous avons reçus spontanément par certains participants à l’enquête. Cette démarche, menée en 2010, illustre en particulier trois aspects : 1. les représentations associées au travail au sein de l’administration en regard de son évolution, et le degré d’identification à l’institution dans ce contexte ; 2. la perception de la modernisation et le rôle de la hiérarchie dans cette perspective ; 3. les identités représentées au sein de l’institution (logiques dominante et alternatives, profils en congruence ou en dissonance). Nous montrerons notamment que la majorité des positions est marquée par la dissonance. Celle-ci est principalement relative d’une part, à la valeur ajoutée de la modernisation, dont tous ne semblent pas convaincus à ce jour ; d’autre part, à la mise en œuvre concrète de celle-ci (effets sur les structures et l’organisation du travail, pratiques de GRH actuellement perçues comme peu transparentes, voire hétéroclites, et style de management en vigueur au sein de l’institution). Notre visée, dans cet article, est de mettre en évidence l’intérêt d’une approche polyphonique de la gestion du changement (Pichault, 2009), et de proposer quelques pistes de réflexion sur l’intégration de ce souci de la diversité identitaire dans les pratiques de gestion de l’entreprise. Nous évoquerons également le potentiel en termes de développement d’outils à destination du gestionnaire articulés sur la diversité identitaire au sein de l’organisation. Les résultats de notre démarche mettent en évidence, à notre sens, plusieurs enjeux, déclinables en pistes d’action, qui constituent les réflexions conclusives de cette communication : • Reconstruire le sens du changement en fonction des trois grandes logiques identitaires : le déficit de connaissance et d’appropriation du processus de modernisation dans lequel s’est engagé l’administration régionale doit pouvoir être comblé. Dans cette perspective, la priorité est, selon nous, d’adopter une approche dite « polyphonique », c’est-à-dire prenant explicitement en compte la diversité des sensibilités en présence, et ne réduisant pas la communication à un « message unique » réducteur. Ainsi, il s’agira de mettre en œuvre une démarche diversifiée selon les profils identitaires représentés au sein de l’institution. • Réduire la dissonance : cet objectif nous semble crucial par les effets potentiellement bénéfiques qu’il peut entraîner sur le sentiment d’appartenance du personnel et son degré de motivation au travail. Le principal axe à investir, selon les résultats de l’enquête, consiste en une opération de clarification rapide de la vision RH, apportant notamment des précisions sur les modalités de mise en œuvre de celle-ci et de son inscription dans le contexte de l’administration régionale. • Soutenir la ligne hiérarchique : considérant le caractère central de ce niveau de fonction en termes de transmission et de création de sens, et comme potentiels facilitateurs dans l’appropriation du changement, il apparaît, à notre sens, essentiel de prodiguer au middle management un soutien dans l’exercice de sa fonction. Il s’agira notamment de définir explicitement les attentes liées à ce rôle ainsi que leurs droits, devoirs et moyens d’action, et d’intégrer ces attentes dans les pratiques de GRH (nous pensons notamment aux dispositifs d’évaluation). [less ▲]

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See detailIntermediaries, transport costs and interlinked transaction
Tharakan, Joseph ULg

Conference (2011, November)

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See detailConsidering non-alluvial layers in morphodynamic modelling
Rulot, François ULg; Erpicum, Sébastien ULg; Dewals, Benjamin ULg et al

Conference (2011, November)

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See detailTwo optimal control methods for the inverse dynamics of underactuated multibody systems
Guimaraes Bastos Junior, Guaraci ULg; Seifried, Robert; Bruls, Olivier ULg

Conference (2011, November)

The inverse dynamics analysis of underactuated multibody systems aims at determining the control inputs in order to track a prescribed trajectory. This work studies the inverse dynamics of non-minimum ... [more ▼]

The inverse dynamics analysis of underactuated multibody systems aims at determining the control inputs in order to track a prescribed trajectory. This work studies the inverse dynamics of non-minimum phase underactuated multibody systems, e.g. for end-effector control of flexible manipulators or manipulators with passive joints. Unlike for minimum phase systems, the inverse dynamics of non-minimum phase systems cannot be solved by adding trajectory constraints to the equations of motion and by applying a forward time integration. Indeed, the inverse dynamics of a non-minimum phase system is known to be non-causal, which means that the control forces and torques should start before the beginning of the trajectory (pre-actuation phase) and continue after the end-point is reached (post-actuation phase). The existing stable inversion method proposed for general nonlinear non-minimum phase systems requires to derive explicitly the equations of the internal dynamics and to solve a boundary value problem. In this work, an alternative solution strategy is proposed which is based on an optimal control approach. More precisely, the direct collocation method and the multiple shooting are considered to solve the resulting optimization problem. The method is illustrated for the inverse dynamics of rigid and flexible underactuated mechanisms. An important advantage of the proposed approach is that it can be applied directly to the standard equations of motion of multibody systems either in ODE or in DAE form. Therefore, it is easier to implement this method in a general purpose simulation software. [less ▲]

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See detaileLearning et évaluation formative, un mariage heureux
Van de Poël, Jean-François ULg

Conference (2011, November)

Cette présentation était destinée à démontrer en quoi les outils eLearning pouvaient être mis au service des démarches d'évaluation formative mises en oeuvre par les enseignants.

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See detailL’école en crise de confiance ?
Fraiture, Sébastien ULg

Conference (2011, October 28)

En Communauté française de Belgique, dans le secondaire, la thématique de la confiance apparait très régulièrement dans le discours des enseignants et des directeurs d’école. Le plus souvent, le terme est ... [more ▼]

En Communauté française de Belgique, dans le secondaire, la thématique de la confiance apparait très régulièrement dans le discours des enseignants et des directeurs d’école. Le plus souvent, le terme est mobilisé pour caractériser une situation de souffrance ou d’inconfort dans les relations avec les autres acteurs de l’enseignement. Dans cet article, nous chercherons à montrer qu’un décalage peut être souligné entre la confiance à laquelle aspirent les enseignants et l’évolution de la nature des relations sociales recouvertes par la notion. Cela nous amènera à poser la question de la confiance différemment et d’envisager le sentiment de perte de confiance comme le produit d’une vulnérabilité accrue du métier d’enseignant. Enfin, nous verrons qu’au sein des relations internes à l’établissement, les relations professionnelles obéissent à une exigence de confiance mutuelle qui ne s’oppose qu’en apparence au renforcement de la vulnérabilité précité. [less ▲]

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See detailDe l'homme à l'oeuvre et vice-versa. Microfictions dictionnairiques.
Saint-Amand, Denis ULg

Conference (2011, October 28)

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See detailEtat des lieux et paysage de la médiation scolaire en Belgique francophone
Dethier, Baptiste ULg; Schoenaers, Frédéric ULg

Conference (2011, October 28)

Dans le contexte d’un pluralisme normatif croissant et d’une école qui subit d’importantes mutations à travers une crise de l’autorité et de la légitimité, la médiation scolaire est apparue comme une ... [more ▼]

Dans le contexte d’un pluralisme normatif croissant et d’une école qui subit d’importantes mutations à travers une crise de l’autorité et de la légitimité, la médiation scolaire est apparue comme une réponse à la difficulté d’adéquation entre la société et le milieu scolaire. L’étude que nous avons réalisée sur les dispositifs et les acteurs de la médiation scolaire en Belgique francophone permet de mieux saisir les caractéristiques et surtout l’hétérogénéité du travail de ces nouveaux acteurs. Issus de réponses politiques ou d’initiatives locales, ils se réapproprient de multiples façons le concept de médiation et les directives imprécises qui leur sont données. À ce titre, les apports récents de la sociologie des professions nous aideront dans l’analyse de leur « situation professionnelle ». [less ▲]

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See detailCapacity for Cognitive and Emotional Empathy in Alcohol-Dependent Patients
Dethier, Marie ULg; Blairy, Sylvie ULg

Conference (2011, October 28)

This study assessed two facets of empathy never explored before in male alcohol-dependent patients (ADs) divided into two groups according to Cloninger’s typology of alcoholism: the attribution of ... [more ▼]

This study assessed two facets of empathy never explored before in male alcohol-dependent patients (ADs) divided into two groups according to Cloninger’s typology of alcoholism: the attribution of intentions according to emotional facial expressions (EFEs) and emotional contagion in reaction to EFEs. Twenty three type I ADs, 21 type II ADs, and 24 controls were compared in two computerized tasks. First, the participants had to rate to what extent an adjective descriptive of personality weighted on the interpersonal dimensions of rejection, aggressiveness, dominance, and affiliation corresponded to a film changing from a neutral EFE to an intense EFE. Second, they had to evaluate their own emotional state after watching a series of films depicting EFEs while their own face was being filmed. The results showed that ADs attributed more intentions of rejection and fewer intentions of affiliation to EFEs of men compared to male controls and that this biased attribution was largely due to depression. Furthermore, AD subtypes showed a different pattern of intention attribution according to the emotions portrayed and according to the sex of the stimulus. In addition, the mimicry of angry EFEs was stronger in type II ADs than in other participants. Finally, ADs expressed fewer positive emotions and more negative emotions than controls when watching EFEs. Our findings outline the importance of differentiation in terms of alcoholism subtype, and contribute to the understanding of the interpersonal behaviors of ADs. [less ▲]

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See detail"How to measure quality in job transitions?"
Levêque, Audrey ULg; Orianne, Jean-François ULg; Pichault, François ULg

Conference (2011, October 27)

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See detailApplying Clinical Research Methodology from Pharma to Food: Osteoporosis Claims
Bruyère, Olivier ULg

Conference (2011, October 27)

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See detailRanging behaviour and sleeping sites in Macaca fascicularis at Bali Barat National Park, Indonesia
Brotcorne, Fany ULg; Maslarov, Cindy; Dosogne, Thibaut et al

Conference (2011, October 26)

Ranging behaviour and sleeping site selection are important aspects of primate ecology in their adaptation to the environment. Several non-exclusive factors have been suggested to explain sleeping site ... [more ▼]

Ranging behaviour and sleeping site selection are important aspects of primate ecology in their adaptation to the environment. Several non-exclusive factors have been suggested to explain sleeping site selection in primates: predation avoidance, food resources proximity, interactions with conspecifics, physical comfort, and parasite avoidance. We tested the role of some factors in a group of Macaca fascicularis living in a human-modified landscape in Bali Barat National Park, during 3 months from April-June 2011. Despite the large area of available forest, the group’s home range was centred around human-settlements (park headquarters). The home range size, as well as the average daily range and daily travel, decreased over the study months. These results correlated with the increase of human presence inside the park over the corresponding months. Regarding sleeping sites, the use pattern also seemed to be influenced by the attraction to human settlements. Indeed, macaques slept more than expected close to human-settlements and this tendency increased over the months. 75% of the 56 observed nights were spent inside the core area, an argument for the role of intergroup competition avoidance. In contradiction with the predation avoidance assumption, the DBH and the height of sleeping trees were not significantly greater than those of control trees. On the other hand, most of sleeping trees had no liana on the trunk and a high arboreal connectivity with surrounding trees. Also, the rate of consecutive sleeping site reuse was very low (12%), minimizing the detection by predators. We conclude that the main strategy of this M. fascicularis group could be sleeping not too far from humans because it is advantageous for predator avoidance and proximity to human food, but that additional influences should not be neglected. [less ▲]

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See detailBrussels II Regulation, child abduction and International Mediation
Pfeiff, Silvia ULg

Conference (2011, October 26)

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See detailLa coccinelle asiatique est-elle l'aphidiphage dominant dans les agro-écosystemes ?
Vandereycken, Axel ULg; Durieux, Delphine ULg; Joie, Emilie ULg et al

Conference (2011, October 26)

La coccinelle asiatique, Harmonia axyridis Pallas, importée en Europe de l'Ouest afin de lutter contre les pucerons et les cochenilles, s'y est rapidement acclimatée. Cette espèce exotique est devenue ... [more ▼]

La coccinelle asiatique, Harmonia axyridis Pallas, importée en Europe de l'Ouest afin de lutter contre les pucerons et les cochenilles, s'y est rapidement acclimatée. Cette espèce exotique est devenue invasive et exerce un impact négatif sur la biodiversité en entrant en prédation intraguilde avec les espèces natives. Afin d'évaluer l'importance de l'invasion de cette espèce exotique, un inventaire des prédateurs de pucerons a été réalisé en 2009 et 2010 au sein de quatre cultures : maïs, froment, pomme de terre et fève des marais, situées dans le Sud de la Belgique. Cinq espèces aphidiphages majoritaires ont été observées; par ordre décroissant d'importance: Episyrphus balteatus (De Geer), Chrysoperla carnea sensus lato (Stephens), Coccinella septempunctata (Linné), Harmonia axyridis Pallas et Propylea quatuordecimpunctata (Linné). La coccinelle asiatique ne représente que 8,7 % de tous les prédateurs de pucerons observés et 23,9% de toutes les coccinelles. De plus, elle est deux fois moins abondante que la coccinelle à sept points. Cette espèce invasive n'est donc actuellement pas l'aphidiphage le plus abondant dans les agro-écosystèmes wallons. [less ▲]

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See detailBehavioural ecotoxicology in amphibians: development of biomarkers
Denoël, Mathieu ULg

Conference (2011, October 25)

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See detailRégulation du potassium
Krzesinski, Jean-Marie ULg

Conference (2011, October 25)

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See detailDetecting faint companions with PIONIER
Absil, Olivier ULg

Conference (2011, October 25)

One of the main goals of the PIONIER visitor instrument at VLTI is to search for faint companions around relatively bright stars. In this talk, we present a general method to search for companions in ... [more ▼]

One of the main goals of the PIONIER visitor instrument at VLTI is to search for faint companions around relatively bright stars. In this talk, we present a general method to search for companions in PIONIER data, with a particular emphasis on the exploitation of closure phases. Our search method is illustrated on a few exemples, including the detection of companions at the ~1% contrast level, and non-detections showing upper limits of a few 0.1% on the contrast of any companion within the interferometric field-of-view. In particular, we demonstrate that the small near-infrared excesses previously reported around several main-sequence stars with precision near-infrared interferometry is not related to the presence of low-mass companions around the target stars. The current limitations of PIONIER are shortly discussed, and we derive some general guidelines on how to best use an interferometric array for faint companion detection. Finally, we discuss how the dynamic range and angular resolution provided by of PIONIER can serve various scientific goals, ranging from low-mass companions around main sequence stars to massive binaries. We show that PIONIER could detect objects at the brown dwarf / planet boundary for young low-mass stars residing in nearby associations. [less ▲]

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See detailOndes de choc et traitement des lésions tendinomusculaires en 2011
Kaux, Jean-François ULg

Conference (2011, October 24)

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See detailLogging impacts in Central African moist forests
Doucet, Jean-Louis ULg

Conference (2011, October 24)

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See detailDe la chaîne au réseau : numériser le livre
Habrand, Tanguy ULg

Conference (2011, October 21)

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See detailDie Wehrmachtjustiz als Instrument der Besatzungspolitik in Belgien
Brüll, Christoph ULg

Conference (2011, October 21)

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See detailAppel au peuple/appel du public : propositions méthodologiques pour une étude de réception
Servais, Christine ULg

Conference (2011, October 21)

La communication se propose d'examiner les textes médiatiques à partir de la manière dont ils s'adressent au peuple et, par ce fait, le représentent. Les notions d' "adresse" et de "partage du sensible ... [more ▼]

La communication se propose d'examiner les textes médiatiques à partir de la manière dont ils s'adressent au peuple et, par ce fait, le représentent. Les notions d' "adresse" et de "partage du sensible" sont au coeur de cette démarche méthodologique. [less ▲]

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See detailDe dubbele gelaagdheid van het Belgisch federalisme
Behrendt, Christian ULg

Conference (2011, October 21)

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See detailRepenser l'activité dans la maladie d'Alzheimer
Adam, Stéphane ULg

Conference (2011, October 21)

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See detailLe champ de la santé mentale en Belgique à l’épreuve de la concertation : entre participation politique et politique de la participation
Thunus, Sophie ULg

Conference (2011, October 21)

Dès le début des années 2000, l'Organisation Mondiale de la Santé invite les gouvernements à promouvoir la santé mentale de leurs citoyens, et en propose une conception spécifique ainsi que des solutions ... [more ▼]

Dès le début des années 2000, l'Organisation Mondiale de la Santé invite les gouvernements à promouvoir la santé mentale de leurs citoyens, et en propose une conception spécifique ainsi que des solutions thérapeutiques et politiques, parmi lesquelles la participation des usagers. Progressivement, les recommandations de l'OMS intègrent le discours politique belge. Il faut pourtant attendre 2005 pour qu'elles trouvent une expression tangible, au sein d'un dispositif d'action publique. Celui-ci comprend deux niveaux. D'une part, des projets locaux au sein desquels professionnels et usagers expérimentent les conditions de travail en réseaux de soins. D'autre part, un volet transversal où les représentants des projets partagent les enseignements issus de pratiques novatrices, afin de les inscrire au sein de recommandations destinées aux décideurs politiques. Au travers d'une étude de cas portant sur le volet transversal, nous nous proposons de confronter cette conception de la santé mentale, ainsi que le discours sur la participation qui l'accompagne, aux pratiques qui se déploient dans leur sillon. Combinant analyse documentaire, entretiens semi-directifs et observations, cette étude de cas nous autorise effectivement à décortiquer les ressorts d'un processus de participation, et à interroger le recours aux savoirs d'expérience, son utilité, et son utilisation. [less ▲]

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